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Model ARM backend ABI selection after the front end code doing the

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same. This will change the "bare metal" ABI from APCS to AAPCS.

The only difference between the front and back end code is that
the code for Triple::GNU was added for environment. That will migrate
to the front end shortly.

Tests updated with the ABI they were originally testing in the case
of bare metal (e.g. -mtriple armv7) or with a -gnu for arm-linux
triples.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224489 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher 2014-12-18 02:08:45 +00:00
parent ee40b16641
commit 360cbd4839
6 changed files with 42 additions and 25 deletions
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52
lib/Target/ARM/ARMSubtarget.cpp
View File

@ -225,8 +225,8 @@ void ARMSubtarget::initSubtargetFeatures(StringRef CPU, StringRef FS) {
// Insert the architecture feature derived from the target triple into the
// feature string. This is important for setting features that are implied
// based on the architecture version.
std::string ArchFS = ARM_MC::ParseARMTriple(TargetTriple.getTriple(),
CPUString);
std::string ArchFS =
ARM_MC::ParseARMTriple(TargetTriple.getTriple(), CPUString);
if (!FS.empty()) {
if (!ArchFS.empty())
ArchFS = ArchFS + "," + FS.str();
@ -246,29 +246,45 @@ void ARMSubtarget::initSubtargetFeatures(StringRef CPU, StringRef FS) {
InstrItins = getInstrItineraryForCPU(CPUString);
if (TargetABI == ARM_ABI_UNKNOWN) {
switch (TargetTriple.getEnvironment()) {
case Triple::Android:
case Triple::EABI:
case Triple::EABIHF:
case Triple::GNUEABI:
case Triple::GNUEABIHF:
TargetABI = ARM_ABI_AAPCS;
break;
default:
if (TargetTriple.isOSBinFormatMachO() &&
TargetTriple.getOS() == Triple::UnknownOS)
// FIXME: This is duplicated code from the front end and should be unified.
if (TargetTriple.isOSBinFormatMachO()) {
if (TargetTriple.getEnvironment() == llvm::Triple::EABI ||
(TargetTriple.getOS() == llvm::Triple::UnknownOS &&
TargetTriple.getObjectFormat() == llvm::Triple::MachO) ||
CPU.startswith("cortex-m")) {
TargetABI = ARM_ABI_AAPCS;
else
} else {
TargetABI = ARM_ABI_APCS;
break;
}
} else if (TargetTriple.isOSWindows()) {
// FIXME: this is invalid for WindowsCE
TargetABI = ARM_ABI_AAPCS;
} else {
// Select the default based on the platform.
switch (TargetTriple.getEnvironment()) {
case llvm::Triple::Android:
case llvm::Triple::GNUEABI:
case llvm::Triple::GNUEABIHF:
case llvm::Triple::EABIHF:
case llvm::Triple::EABI:
TargetABI = ARM_ABI_AAPCS;
break;
case llvm::Triple::GNU:
TargetABI = ARM_ABI_APCS;
break;
default:
if (TargetTriple.getOS() == llvm::Triple::NetBSD)
TargetABI = ARM_ABI_APCS;
else
TargetABI = ARM_ABI_AAPCS;
break;
}
}
}
// FIXME: this is invalid for WindowsCE
if (isTargetWindows()) {
TargetABI = ARM_ABI_AAPCS;
if (isTargetWindows())
NoARM = true;
}
if (isAAPCS_ABI())
stackAlignment = 8;

4
test/CodeGen/ARM/arm-abi-attr.ll
View File

@ -1,5 +1,5 @@
; RUN: llc -mtriple=arm-linux < %s | FileCheck %s --check-prefix=APCS
; RUN: llc -mtriple=arm-linux -mattr=apcs < %s | \
; RUN: llc -mtriple=arm-linux-gnu < %s | FileCheck %s --check-prefix=APCS
; RUN: llc -mtriple=arm-linux-gnu -mattr=apcs < %s | \
; RUN: FileCheck %s --check-prefix=APCS
; RUN: llc -mtriple=arm-linux-gnueabi -mattr=apcs < %s | \
; RUN: FileCheck %s --check-prefix=APCS

2
test/CodeGen/ARM/atomic-64bit.ll
View File

@ -1,6 +1,6 @@
; RUN: llc < %s -mtriple=armv7-apple-ios | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-LE
; RUN: llc < %s -mtriple=thumbv7-none-linux-gnueabihf | FileCheck %s --check-prefix=CHECK-THUMB --check-prefix=CHECK-THUMB-LE
; RUN: llc < %s -mtriple=armebv7 | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-BE
; RUN: llc < %s -mtriple=armebv7 -mattr=apcs | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-BE
; RUN: llc < %s -mtriple=thumbebv7-none-linux-gnueabihf | FileCheck %s --check-prefix=CHECK-THUMB --check-prefix=CHECK-THUMB-BE
define i64 @test1(i64* %ptr, i64 %val) {

2
test/CodeGen/ARM/dagcombine-concatvector.ll
View File

@ -1,5 +1,5 @@
; RUN: llc < %s -mtriple=thumbv7s-apple-ios3.0.0 -mcpu=generic | FileCheck %s -check-prefix=CHECK -check-prefix=CHECK-LE
; RUN: llc < %s -mtriple=thumbeb -mattr=v7,neon | FileCheck %s -check-prefix=CHECK -check-prefix=CHECK-BE
; RUN: llc < %s -mtriple=thumbeb -mattr=apcs -mattr=v7,neon | FileCheck %s -check-prefix=CHECK -check-prefix=CHECK-BE
; PR15525
; CHECK-LABEL: test1:

2
test/CodeGen/ARM/emit-big-cst.ll
View File

@ -1,4 +1,4 @@
; RUN: llc -mtriple=thumbv7-unknown-unknown < %s | FileCheck %s
; RUN: llc -mtriple=thumbv7-unknown-unknown -mattr=apcs < %s | FileCheck %s
; Check assembly printing of odd constants.
; CHECK: bigCst:

5
test/CodeGen/ARM/tail-call.ll
View File

@ -1,5 +1,6 @@
; RUN: llc -mtriple armv7 -O0 -o - < %s | FileCheck %s -check-prefix CHECK-TAIL
; RUN: llc -mtriple armv7 -O0 -disable-tail-calls -o - < %s \
; RUN: llc -mtriple armv7 -mattr=apcs -O0 -o - < %s \
; RUN: | FileCheck %s -check-prefix CHECK-TAIL
; RUN: llc -mtriple armv7 -mattr=apcs -O0 -disable-tail-calls -o - < %s \
; RUN: | FileCheck %s -check-prefix CHECK-NO-TAIL
declare i32 @callee(i32 %i)